Native to Africa, the ostrich holds the title for being the largest bird in the world. It can stand up to 9 feet tall and weigh as much as 320 pounds.
A subspecies of the ostrich, the Somali ostrich is slightly smaller but still ranks among the largest birds. It is found in East Africa.
Native to New Guinea and northeastern Australia, the southern cassowary is a large flightless bird known for its striking appearance and powerful kicks.
Native to Australia, the emu is the second-largest bird in the world by height, reaching up to 6.2 feet tall. They are known for their long necks and powerful legs.
Found in South America, the common rhea is a large flightless bird closely related to the ostrich. It can stand up to 5.6 feet tall and weigh around 88 pounds.
Another species of rhea, the greater rhea is slightly larger than the common rhea. It inhabits grasslands and savannas in South America.
The largest of all penguin species, the emperor penguin is native to Antarctica. While not as tall as some other large birds, it is quite hefty, with males weighing up to 88 pounds.
Found in Africa, the kori bustard is the heaviest flying bird in the world. It can weigh up to 42 pounds and has a wingspan of up to 9 feet.
Among the heaviest flying bird species, the Dalmatian pelican is native to Europe and Asia. It has a wingspan of up to 11.5 feet and can weigh over 33 pounds.